EP0283676B1 - Paper punch - Google Patents

Paper punch Download PDF

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Publication number
EP0283676B1
EP0283676B1 EP88101341A EP88101341A EP0283676B1 EP 0283676 B1 EP0283676 B1 EP 0283676B1 EP 88101341 A EP88101341 A EP 88101341A EP 88101341 A EP88101341 A EP 88101341A EP 0283676 B1 EP0283676 B1 EP 0283676B1
Authority
EP
European Patent Office
Prior art keywords
punch
paper
support member
pressure body
head
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP88101341A
Other languages
German (de)
French (fr)
Other versions
EP0283676A2 (en
EP0283676A3 (en
Inventor
Theodor Pflugfelder
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Louis Leitz Firma
Original Assignee
Louis Leitz Firma
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Louis Leitz Firma filed Critical Louis Leitz Firma
Priority to AT88101341T priority Critical patent/ATE64884T1/en
Publication of EP0283676A2 publication Critical patent/EP0283676A2/en
Publication of EP0283676A3 publication Critical patent/EP0283676A3/en
Application granted granted Critical
Publication of EP0283676B1 publication Critical patent/EP0283676B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/32—Hand-held perforating or punching apparatus, e.g. awls
    • B26F1/36—Punching or perforating pliers

Definitions

  • pressure bodies are arranged on the underside of the pressure lever, which act on the convexly curved end faces of the punch.
  • the pressure body and the punch punch touch each other in a punctiform manner, so that relatively high surface pressures occur.
  • a tilting moment is exerted on the punch when the punch is actuated, which causes an undesirable sliding friction of the punch in its guides.
  • the pressure body has a throat on its end face, into which the bridge member engages.
  • a further improvement in this respect is achieved in that the punch has a widened head relative to its shaft, and that the retaining member pushed onto the punch shaft with a bore can be pressed against the back of the punch head under the action of the helical spring.
  • the letter punch essentially consists of a lower part 1 made of sheet steel or cast aluminum, provided with matrices for the punch 5, not shown, on which a plate 2 made of cast aluminum is riveted or molded onto the guides for the punch 5.
  • a pressure lever 3 is mounted on the lateral bearing blocks 21 of the cast plate 2 by means of a continuous bolt 4.
  • a pressure element 31 is formed on the underside of the pressure lever 3 above each punch 5.
  • the downward-facing end face of the pressure body 31 has a groove 32, in which a bridge member 8, which has the shape of an upright, engages with its one convexly curved narrow side. With its opposite, also convexly curved narrow side, the bridge member 8 bears against the widened head 51 of the punch 5.
  • a retaining member 7 designed as a U-shaped bracket is used to hold the bridge member 8.
  • the retaining member 7 engages under the head 51 of the punch 5 with its web provided with a bore for the passage of the punch shaft 52 from the upper end against the web 73 of the holding member 7, while it engages with its lower end in an annular recess 22 surrounding the punch 5 of the steel plate 2.

Abstract

The paper punch consists essentially of a bottom part (1), to which is riveted, or on which is integrally formed, a cast iron plate (2) forming the guides for the punches (5). A pressure lever (3) is mounted, by means of a pin (4), on the lateral bearing blocks (21) of the cast iron plate (2). A pressure member (31) is integrally formed on the underside of the pressure lever (3) above each hole punch (5). Located between the pressure member (31) and the hole-punch head (51) is a bridge member (8) which is arranged tiltably in a bow-shaped holding member (7) articulated on the pressure member (31) and engaging behind the hole-punch head (51). <IMAGE>

Description

Die Erfindung betrifft einen Brieflocher mit einem Unterteil, mit einem an Lagerböcken des Unterteils angelenkten Druckhebel und mit an ihrem Kopf unter der Einwirkung eines am Druckhebel angeordneten Druckkörpers entgegen der Rückstellkraft von Schraubenfedern in Führungen des Unterteils verschiebbaren und mit im Unterteil angeordneten Matrizen zusammenwirkenden Lochstempeln.The invention relates to a letter punch with a lower part, with a pressure lever articulated on bearing blocks of the lower part, and with punches which can be displaced in guides of the lower part and interact with matrices arranged in the lower part and on their head under the action of a pressure body arranged on the pressure lever against the restoring force of coil springs.

Bei einem bekannten Brieflocher dieser Art (USA-A 3485130) sind an der Unterseite des Druckhebels Druckkörper angeordnet, die auf die konvex gekrümmten Stirnflächen der Lochstempel einwirken. Die Druckkörper und die Lochstempel berühren sich dabei punktförmig, so daß verhältnismäßig hohe Flächendrücke auftreten. Dadurch wird bei der Locherbetätigung auf die Lochstempel ein Kippmoment ausgeübt, das eine unerwünschte Gleitreibung der Lochstempel in ihren Führungen hervorruft.In a known letter punch of this type (USA-A 3485130), pressure bodies are arranged on the underside of the pressure lever, which act on the convexly curved end faces of the punch. The pressure body and the punch punch touch each other in a punctiform manner, so that relatively high surface pressures occur. As a result, a tilting moment is exerted on the punch when the punch is actuated, which causes an undesirable sliding friction of the punch in its guides.

Der Erfindung liegt die Aufgabe zugrunde, die bekannten Brieflocher dahingehend zu verbessern, daß das Auftreten von die Betätigung des Brieflochers erschwerenden und die Funktion beeinträchtigenden Reibungskräften weitgehend vermieden wird.The invention has for its object to improve the known letter punch in such a way that the occurrence of frictional forces aggravating the operation of the letter punch and impairing the function is largely avoided.

Zur Lösung dieser Aufgabe werden die im Patentanspruch 1 angegebenen Merkmale vorgeschlagen. Weitere vorteilhafte Ausgestaltung und Weiterbildung des Erfindungsgedankens ergeben sich aus den abhängigen Ansprüchen.To achieve this object, the features specified in claim 1 are proposed. A further advantageous embodiment and further development of the inventive concept result from the dependent claims.

Die erfinderische Lösung geht von der Erkenntnis aus, daß der Kraftangriffspunkt des am Druckhebel angeordneten Druckkörpers auf dem Lochstempel im Verlauf eines Hubs einen Teilkreis um den Drehpunkt des Druckhebels beschreibt und daher bei senkrechter Bewegung des Lochstempels eine Querreibung auf den Stempelkopf ausübt. Um dies zu vermeiden wird gemäß der Erfindung vorgeschlagen, daß zwischen Druckkörper und Lochstempelkopf ein mit konvex gekrümmten Flächen unverschiebbar gegen die Stirnfläche des Druckkörpers und den Lochstempelkopf anliegendes Brückenglied angeordnet ist, das seinerseits kippbar in einem am Druckkörper angelenkten und den Lochstempelkopf hintergreifenden Halteglied angeordnet ist.The inventive solution is based on the knowledge that the force application point of the pressure body arranged on the pressure lever on the punch in the course of a stroke describes a pitch circle around the pivot point of the pressure lever and therefore exerts transverse friction on the punch head when the punch is moved vertically. To avoid this, it is proposed according to the invention that between the pressure body and the punch head a convexly curved surface is arranged against the end face of the pressure body and the punch head, which in turn can be tilted in one is arranged articulated on the pressure body and behind the punch head holding member.

Um eine zuverlässige Führung des Brückenglieds zu gewährleisten, weist der Druckkörper an seiner Stirnfläche eine Kehle auf, in die das Brückenglied eingreift. Eine weitere Verbesserung in dieser Hinsicht wird dadurch erreicht, daß der Lochstempel einen gegenüber seinem Schaft verbreiterten Kopf aufweist, und daß das mit einer Bohrung auf den Lochstempelschaft aufgeschobene Halteglied unter der Einwirkung der Schraubenfeder rückseitig gegen den Lochstempelkopf andrückbar ist.In order to ensure reliable guidance of the bridge member, the pressure body has a throat on its end face, into which the bridge member engages. A further improvement in this respect is achieved in that the punch has a widened head relative to its shaft, and that the retaining member pushed onto the punch shaft with a bore can be pressed against the back of the punch head under the action of the helical spring.

Vorteilhafterweise ist das Halteglied mittels eines ein Langloch des Halteglieds durchsetzenden Stifts am Druckkörper angelenkt. Das Langloch ist dabei im wesentlichen quer zur Verschieberichtung des Lochstempels am Halteglied ausgerichtet.The holding member is advantageously articulated on the pressure body by means of a pin which passes through an elongated hole in the holding member. The elongated hole is oriented essentially transversely to the direction of displacement of the punch on the holding member.

Gemäß einer bevorzugten Ausgestaltung der Erfindung weist das Halteglied die Gestalt eines U-förmig gebogenen Bügels auf. Der Steg des Bügels hintergreift dabei den Lochstempelkopf, während die beiden Schenkel über den Lochstempelkopf überstehen. An den Schenkeln sind nach innen abgebogene, das Brückenglied zwischen sich aufnehmende Lippen vorgesehen, deren Abstand sich nach oben erweitert, um die Kippbewegung des Brückengliedes zu ermöglichen. Die Lippen können dabei aus dem Schenkelmaterial ausgestanzt und aus diesem herausgebogen werden. Die dadurch gebildete Stanzöffnung sollte eine kleinere Höhe als das Brückenglied aufweisen, so daß ein rundum geschlossener Käfig für das Brückenglied gebildet wird.According to a preferred embodiment of the invention, the holding member has the shape of a U-shaped bow. The web of the bracket engages behind the punch head, while the two legs protrude beyond the punch head. On the legs are bent inwards, the bridge member between them receiving lips, the spacing of which widens upwards to enable the tilting movement of the bridge member. The lips can be punched out of the thigh material and bent out of it. The punch opening formed thereby should have a smaller height than the bridge member, so that a completely closed cage is formed for the bridge member.

Zweckmäßig ist in jedem Schenkel des U-förmig gebogenen Halteglieds ein von dem Stift durchsetztes Langloch angeordnet. Der Stift kann zusätzlich in einer den Druckkörper seitlich überlappenden Wange des Druckhebels gelagert sein.A slot through which the pin passes is expediently arranged in each leg of the U-shaped bent holding member. The pin can additionally be mounted in a cheek of the pressure lever that overlaps the pressure body laterally.

Im folgenden wird die Erfindung anhand des in der Zeichnung in schematischer Weise dargestellten Ausführungsbeispiels näher erläutert. Es zeigen:

Fig. 1
einen senkrechten Schnitt durch den Brieflocher in einer Lochstempelebene senkrecht zum Einschiebschlitz;
Fig. 2
einen Teilschnitt nach der Schnittlinie II-II der Fig. 1;
Fig. 3
eine perspektivische Explosionsdarstellung eines Teils des Brieflochers.
The invention is explained in more detail below with reference to the exemplary embodiment shown schematically in the drawing. Show it:
Fig. 1
a vertical section through the letter punch in a punch plane perpendicular to the insertion slot;
Fig. 2
a partial section along the section line II-II of Fig. 1;
Fig. 3
an exploded perspective view of part of the letter punch.

Der Brieflocher besteht im wesentlichen aus einem mit nicht dargestellten Matrizen für die Lochstempel 5 versehenen Unterteil 1 aus Stahlblech oder Aluminiumguß, an dem eine die Führungen für die Lochstempel 5 aufweisende Platte 2 aus Aluminiumguß angenietet oder angeformt ist. An den seitlichen Lagerböcken 21 der Gußplatte 2 ist ein Druckhebel 3 mittels eines durchgehenden Bolzens 4 gelagert. An der Unterseite des Druckhebels 3 ist oberhalb eines jeden Lochstempels 5 ein Druckkörper 31 angeformt. Die nach unten weisende Stirnfläche des Druckkörpers 31 weist eine Kehle 32 auf, in die ein die Gestalt eines Hochkants aufweisendes Brückenglied 8 mit seiner einen, konvex gekrümmten Schmalseite eingreift. Mit seiner entgegengesetzten, ebenfalls konvex gekrümmten Schmalseite liegt das Brückenglied 8 gegen den verbreiterten Kopf 51 des Lochstempels 5 an.The letter punch essentially consists of a lower part 1 made of sheet steel or cast aluminum, provided with matrices for the punch 5, not shown, on which a plate 2 made of cast aluminum is riveted or molded onto the guides for the punch 5. A pressure lever 3 is mounted on the lateral bearing blocks 21 of the cast plate 2 by means of a continuous bolt 4. A pressure element 31 is formed on the underside of the pressure lever 3 above each punch 5. The downward-facing end face of the pressure body 31 has a groove 32, in which a bridge member 8, which has the shape of an upright, engages with its one convexly curved narrow side. With its opposite, also convexly curved narrow side, the bridge member 8 bears against the widened head 51 of the punch 5.

Zur Halterung des Brückenglieds 8 dient ein als U-förmiger Bügel ausgebildetes Halteglied 7. Das Halteglied 7 untergreift mit seinem eine Bohrung für den Durchtritt des Lochstempelschaftes 52 versehenen Steg den Kopf 51 des Lochstempels 5. Die den Lochstempel 5 umschließende Schraubenfeder 6 stützt sich mit ihrem oberen Ende gegen den Steg 73 des Halteglieds 7 ab, während sie mit ihrem unteren Ende in eine ringförmige, den Lochstempel 5 umgebende Aussparung 22 der Stahlplatte 2 eingreift.A retaining member 7 designed as a U-shaped bracket is used to hold the bridge member 8. The retaining member 7 engages under the head 51 of the punch 5 with its web provided with a bore for the passage of the punch shaft 52 from the upper end against the web 73 of the holding member 7, while it engages with its lower end in an annular recess 22 surrounding the punch 5 of the steel plate 2.

Innerhalb der Halteglieder 7 kann das Brückenglied 8 eine Kippbewegung ausführen, deren Auslenkung durch aus den Schenkeln 74 des Halteglieds 7 ausgeschnittene, nach innen abgebogene Lippen 71 begrenzt ist. Auf diese Weise liegt das Brückenglied 8 mit seiner konvex gekrümmten unteren Schmalfläche gegen die Stirnfläche des Kopfes 51 des Lochstempels 5 an, ohne seine im wesentlichen linienförmige Berührung mit dem Lochstempelkopf 51 bei der Betätigung des Brieflochers zu verändern.Within the holding members 7, the bridge member 8 can perform a tilting movement, the deflection of which is limited by lips 71 which are cut out of the legs 74 of the holding member 7 and bent inwards. In this way, the bridge member 8 rests with its convexly curved lower narrow surface against the end face of the head 51 of the punch 5 without changing its substantially linear contact with the punch head 51 when the punch is actuated.

In den beiden Schenkeln 74 der Halteglieder 7, zwischen die der auf das Brückenglied 8 einwirkende Druckkörper 31 eingreift, ist oberhalb der Lippen 71 ein quer zur Verschieberichtung des Lochstempels 5 verlaufendes Langloch 72 ausgespart, in das ein den Druckkörper 31 sowie eine Seitenwange 33 des Druckhebels 3 durchsetzender Stift 9 eingreift. Dadurch wird gewährleistet, daß beim Zurückschwenken des Druckhebels 3 auch die Lochstempel 5 zurückgeführt werden, auch wenn die Rückstellkraft der Schraubenfedern 6 nicht ausreichen sollte, die Lochstempel 5 aus dem gelochten Schriftgut wieder nach oben zu drücken.In the two legs 74 of the holding members 7, between which the pressure element 31 acting on the bridge element 8 engages, an elongated hole 72 extending transversely to the direction of displacement of the punch 5 is recessed above the lips 71, into which a pressure element 31 and a side cheek 33 of the pressure lever are inserted 3 penetrating pin 9 engages. This ensures that when the pressure lever 3 is pivoted back, the punches 5 are also returned, even if the restoring force of the coil springs 6 should not be sufficient to push the punches 5 back up out of the perforated documents.

Claims (9)

  1. Paper Punch with a bottom section (1), a pressure lever (3) which is hinged onto mounting brackets (21) of the bottom section (1), and at its head (51) with punch dies (5) which co-act with templates in the bottom section and which are slideable under the effects of a pressure body (31), which is arranged at the pressure lever (3) against the return force of coiled springs (6) in guides of the bottom section, characterised in that a bridging member (8) with convex curved surfaces, which is nondisplaceable relative to the end surface of the pressure body (31), is placed between pressure body (31) and paper-punch head (51), which bridging member is itself tiltably arranged in a support member (7) which is hinged onto the pressure body (31) and reaches behind the punch-die head (51).
  2. : Paper punch according to claim 1, characterised in that the bridging member (8) engages into a face-sided channel (32) of the pressure body (31).
  3. Paper punch according to claim 1 or 2, characterised in that the punch die (5) has a head (51) which is broadened relative to its shaft (52), and in that support member (7), which has been pushed with a bore onto shaft (52) of punch die (5), is pressed at the rear side against the punch-die head (51) under the influence of the coiled spring (6).
  4. Paper punch according to one of claims 1 to 3, characterised in that the support member (7) is hinged onto the pressure body (31) by a bolt (9) which passes through at least one elongate hole (72) of the support member (7).
  5. Paper punch according to claim 4, characterised in that the elongate hole (72) is arranged substantially transverse to the displacement direction of the punch die (5) at support member (7).
  6. Paper punch according to one of claims 1 to 5, characterised in that the support member (7) has the shape of a U-shaped bent yoke, the web (73) of which reaches behind the punch-die head (51), and the shanks (74), which protrude over the punch-die head (51), have lips (71) which are bent inward and receive the bridging member (8) and the distance of which increases upwards.
  7. Paper punch according to claim 6, characterised in that the lips (71) are punched out and bent out of the shank material, and in that the thus formed punch hole is of smaller height than the bridging member (8).
  8. Paper punch according to claim 6 or 7, characterised in that an elongate hole (72), which is passed through by a bolt (9), is arranged in each shank (74) of the support member (7).
  9. Paper punch according to one of claims 4 to 8, characterised in that the pin (9) is additionally mounted in a side (33) of the pressure lever (3), which overlaps the pressure body (31).
EP88101341A 1987-03-25 1988-01-30 Paper punch Expired - Lifetime EP0283676B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88101341T ATE64884T1 (en) 1987-03-25 1988-01-30 MAILHOLE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3709767 1987-03-25
DE19873709767 DE3709767A1 (en) 1987-03-25 1987-03-25 LETTER HOLE

Publications (3)

Publication Number Publication Date
EP0283676A2 EP0283676A2 (en) 1988-09-28
EP0283676A3 EP0283676A3 (en) 1989-11-23
EP0283676B1 true EP0283676B1 (en) 1991-07-03

Family

ID=6323914

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88101341A Expired - Lifetime EP0283676B1 (en) 1987-03-25 1988-01-30 Paper punch

Country Status (5)

Country Link
EP (1) EP0283676B1 (en)
JP (1) JPS63256398A (en)
AT (1) ATE64884T1 (en)
DE (2) DE3709767A1 (en)
ES (1) ES2023958B3 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7942298B2 (en) 2005-09-08 2011-05-17 Acco Brands Usa Llc Paper processing tool with force reducing drive arrangement
US8122805B2 (en) 2007-12-12 2012-02-28 Acco Brands Usa Llc Paper processing tool with three-lever actuation

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5449763A (en) * 1991-10-10 1995-09-12 Henkel Corporation Preparation of alkylpolyglycosides
DE19518901A1 (en) * 1995-05-26 1996-11-28 Leitz Louis Kg Manually actuated punch to destroy data held in smart cards
WO2002002286A2 (en) * 2000-06-30 2002-01-10 Acco Brands, Inc. Four-bar upright punch
CN101267918B (en) 2005-09-08 2012-07-11 阿科布兰兹美国有限责任公司 Paper processing tool drive device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3485130A (en) * 1967-05-09 1969-12-23 Arnold Neustadter Paper centering means for paper punch

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB154255A (en) * 1920-04-20 1920-12-02 Lennox Liddell Improvements in and connected with paper punches
DE2021936A1 (en) * 1970-05-05 1971-11-18 Leitz Fa Louis Letter punch

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3485130A (en) * 1967-05-09 1969-12-23 Arnold Neustadter Paper centering means for paper punch

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7942298B2 (en) 2005-09-08 2011-05-17 Acco Brands Usa Llc Paper processing tool with force reducing drive arrangement
US8122805B2 (en) 2007-12-12 2012-02-28 Acco Brands Usa Llc Paper processing tool with three-lever actuation

Also Published As

Publication number Publication date
EP0283676A2 (en) 1988-09-28
DE3709767A1 (en) 1988-10-13
DE3863450D1 (en) 1991-08-08
EP0283676A3 (en) 1989-11-23
ES2023958B3 (en) 1992-02-16
JPS63256398A (en) 1988-10-24
ATE64884T1 (en) 1991-07-15

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